Malicious PDF — malware analysis report

Static analysis result for SHA-256 ea25608e1031919e…

MALICIOUS

PDF

69.7 KB Created: 2021-03-19 04:53:52 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-30
MD5: 6ce3ec3337b3f525cbdaea679c030bd4 SHA-1: 2df996640e3e001090c428918012d4555a8bd1a0 SHA-256: ea25608e1031919ecf90c536172d597481a2d80b03666e1419c79b6ec6ba6663
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF file was flagged as malicious by a machine learning classifier and ClamAV, indicating a high likelihood of malicious intent. It contains a large number of external links, many pointing to PDF files, suggesting a link farm or SEO poisoning tactic. The primary external URI, https://lozipotod.ru/award?keyword=exercises+on+present+simple+and+past+simple+pdf, is likely used to redirect users to malicious content under the guise of educational material.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • External URI info PDF_URI
    PDF contains an external URL action
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL https://lozipotod.ru/award?keyword=exercises+on+present+simple+and+past+simple+pdf PDF link annotation
    • http://samo-katim.ru/jovimo2m9np.pdfIn PDF document text
    • http://wowogobofomufu.mygamesonline.org/63249454678.pdfIn PDF document text
    • http://wacc-cat.org/fawijojepilefijomolfjzyd.pdfIn PDF document text
    • http://lenusabipowezo.getenjoyment.net/andreas_moritz_liver_flush.pdfIn PDF document text
    • http://pressit.space/45360469555ii30h.pdfIn PDF document text
    • https://noruwapawufibem.weebly.com/uploads/1/3/0/9/130969999/38ed667d8f0.pdfIn PDF document text
    • https://litukepulaj.weebly.com/uploads/1/3/4/8/134863372/kepefazi_dotozekexus.pdfIn PDF document text
    • http://kozugufasuroti.mygamesonline.org/90409774794.pdfIn PDF document text
    • http://lienforkid.com/managing_cultural_differences_moranuh83y.pdfIn PDF document text
    • https://wukelefitifaka.weebly.com/uploads/1/3/4/8/134882985/palujojekorivasini.pdfIn PDF document text
    • http://vuvodagedene.scienceontheweb.net/88599216525.pdfIn PDF document text
    • https://fatuzolawodazu.weebly.com/uploads/1/3/4/7/134730183/laluravodime.pdfIn PDF document text
    • http://bio-ita.fun/difivisofepisazctq7i.pdfIn PDF document text
    • https://xawavefite.weebly.com/uploads/1/3/4/6/134667803/nujijisanof-zalemik-fixukada.pdfIn PDF document text
    • https://zipobirin.weebly.com/uploads/1/3/5/3/135386694/xatotar.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/besafefaf/8407377131.pdfIn PDF document text
    • https://s3.amazonaws.com/suxuzubojut/vodijiguzoxupiwebapebaz.pdfIn PDF document text
    • https://s3.amazonaws.com/ronenitevodo/whatsapp_gb_terbaru_2018_apk.pdfIn PDF document text
    • https://s3.amazonaws.com/wejuvono/67358911974.pdfIn PDF document text
    • https://s3.amazonaws.com/gupawupigawono/vba_copy_range_in_active_sheet.pdfIn PDF document text
    • https://s3.amazonaws.com/tigovatolis/ignou_b._ed_application_form.pdfIn PDF document text
    • https://s3.amazonaws.com/xeropizuwe/manual_backwash_carbon_filter.pdfIn PDF document text
    • https://s3.amazonaws.com/nafibanefexex/xibamepekavonojonagekowut.pdfIn PDF document text
    • https://s3.amazonaws.com/degisapemifa/xewuka.pdfIn PDF document text
    • http://kedisijusa.onlinewebshop.net/mappa_bali.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d536.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD536 5328 bytes
SHA-256: b58be1af4c41445f16569dade576f76fa34a97c8da5ce38a7e4e396988e2f009
font_01_sfnt_off0000e746.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE746 9836 bytes
SHA-256: 887693086aff9d8eb001ca6c94e22a9a37bfdaba3ee36eece45c1162b7632ad5

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